100 gallon mash tun build - Home Brew Forums
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Old 09-15-2009, 02:02 AM   #1
Cold_Steel
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Apr 2009
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First. I have no idea if this will work.
Second. I am really excited to try this!!!!!!
Third. Any and All feed back will be greatly appricated.
Fourth. This could totally not work.



I am going to attach 2 55 gallon food grade plastic barrels together.
It is my understand welding plastic is possible. I plan to stack them on top of one another and join them with the weld.

1st barrel will only have the top removed.
2nd barrel will have the bottom removed and top.

Once joined together. Add all accessories.

What problems do you anticipate me having.
a) the weight of the grain.....will it crush the false bottom?
b)Cleaning of course .....I think i can solve this one with my pressure washer.
c) will a false bottom fit?
d) heat loss.... I will insulate it
e) will it even work as a mash tun?

 
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Old 09-15-2009, 04:29 AM   #2
winstonofbeer
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Jul 2009
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Even if you get this to work without a problem, What do you have for a kettle?
Next question, What do you plan to ferment in and use to maintain temp?

Next question i have, It is plastic. I havent heard of welding plastic together. How well will the "weld" hold?

Just curious questions is all

 
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Old 09-15-2009, 04:38 AM   #3
ClaudiusB
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Quote:
Any and All feed back will be greatly appricated.
Rotate the picture please.

Quote:
What problems do you anticipate me having.
a) the weight of the grain.....will it crush the false bottom?
Depends on your design.
What will be the max grain load per batch?
b)Cleaning of course .....I think i can solve this one with my pressure washer.
Lets hope so
c) will a false bottom fit?
Sure, its all in the design.
You can design a two piece or multiple segment type

d) heat loss.... I will insulate it
e) will it even work as a mash tun?
For me the height to width ratio is off
How do you plan on stirring the mash?
Only single temp mashes?

Cheers,
ClaudiusB

 
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Old 09-15-2009, 04:40 AM   #4
Clayton
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why not just make two 50 gal mash tuns and run then both at the same time
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Old 09-15-2009, 04:49 AM   #5
kerklein2
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I have welded plastic before. It is not easy. It is not fun. It does not work as planned. I would not recommend you do this AT ALL, for many reasons other than plastic welding.

 
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Old 09-15-2009, 04:50 AM   #6
Clayton
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yeah the cuts would have to be ever so plum and square
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Old 09-15-2009, 05:10 AM   #7
justbrewit
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i agree with clayton, make 2 mash tuns, that way if you want to make a beer but don't want to use both tuns, then no problem

i'd watch out with the pressure washer, depending on the type, it can cut and etch plastic, if its a heated pressure washer i'd think it would go right through those
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Old 09-15-2009, 05:44 AM   #8
leboeuf
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welding plastic is totally doable... I did it for a lab I worked for a couple of years. But, if you're going to be welding why not just buy sheets of polypro or polyethylene and build exactly what you want?

That thing is going to be deeeeeeep.

 
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Old 09-15-2009, 01:05 PM   #9
Cold_Steel
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Quote:
Originally Posted by Clayton View Post
why not just make two 50 gal mash tuns and run then both at the same time
I had been wondering if you could use 2. I think this is the best option hands down.

I had no idea you could weld plastic either. I just read about it last night on harbor freight. AWESOME.
Its funny I deleted this post because I didnt think I could do it. This a vampire post....be very afraid.....

When i thought about stirring it, boom it was a deal breaker for me.

 
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Old 09-15-2009, 03:10 PM   #10
leboeuf
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Hahaha yea man.
It really wasn't that hard to weld polypro. Granted I had access to N2 for my weld gas which made for really pretty welds. You can use air also, but it does introduce contaminates that dirty up the plastic a bit. If you do end up going this route look up triple bead welds and practice before you try anything.

We have a huge intel fab out here that keeps supply high so I was able to buy 4x8 sheets of 1/8" polypro for ~$95 a sheet locally (in 2005)

 
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